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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ff45262a KM |
2 | /* |
3 | * LP5562 LED driver | |
4 | * | |
5 | * Copyright (C) 2013 Texas Instruments | |
6 | * | |
7 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
ff45262a KM |
8 | */ |
9 | ||
10 | #include <linux/delay.h> | |
11 | #include <linux/firmware.h> | |
12 | #include <linux/i2c.h> | |
ff45262a KM |
13 | #include <linux/leds.h> |
14 | #include <linux/module.h> | |
15 | #include <linux/mutex.h> | |
c68f46dd | 16 | #include <linux/of.h> |
ff45262a KM |
17 | #include <linux/platform_data/leds-lp55xx.h> |
18 | #include <linux/slab.h> | |
19 | ||
20 | #include "leds-lp55xx-common.h" | |
21 | ||
22 | #define LP5562_PROGRAM_LENGTH 32 | |
23 | #define LP5562_MAX_LEDS 4 | |
24 | ||
25 | /* ENABLE Register 00h */ | |
26 | #define LP5562_REG_ENABLE 0x00 | |
27 | #define LP5562_EXEC_ENG1_M 0x30 | |
28 | #define LP5562_EXEC_ENG2_M 0x0C | |
29 | #define LP5562_EXEC_ENG3_M 0x03 | |
30 | #define LP5562_EXEC_M 0x3F | |
31 | #define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */ | |
32 | #define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ | |
33 | #define LP5562_EXEC_RUN 0x2A | |
34 | #define LP5562_ENABLE_DEFAULT \ | |
35 | (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM) | |
36 | #define LP5562_ENABLE_RUN_PROGRAM \ | |
37 | (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN) | |
38 | ||
39 | /* OPMODE Register 01h */ | |
40 | #define LP5562_REG_OP_MODE 0x01 | |
41 | #define LP5562_MODE_ENG1_M 0x30 | |
42 | #define LP5562_MODE_ENG2_M 0x0C | |
43 | #define LP5562_MODE_ENG3_M 0x03 | |
44 | #define LP5562_LOAD_ENG1 0x10 | |
45 | #define LP5562_LOAD_ENG2 0x04 | |
46 | #define LP5562_LOAD_ENG3 0x01 | |
47 | #define LP5562_RUN_ENG1 0x20 | |
48 | #define LP5562_RUN_ENG2 0x08 | |
49 | #define LP5562_RUN_ENG3 0x02 | |
50 | #define LP5562_ENG1_IS_LOADING(mode) \ | |
51 | ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1) | |
52 | #define LP5562_ENG2_IS_LOADING(mode) \ | |
53 | ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2) | |
54 | #define LP5562_ENG3_IS_LOADING(mode) \ | |
55 | ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3) | |
56 | ||
57 | /* BRIGHTNESS Registers */ | |
58 | #define LP5562_REG_R_PWM 0x04 | |
59 | #define LP5562_REG_G_PWM 0x03 | |
60 | #define LP5562_REG_B_PWM 0x02 | |
61 | #define LP5562_REG_W_PWM 0x0E | |
62 | ||
63 | /* CURRENT Registers */ | |
64 | #define LP5562_REG_R_CURRENT 0x07 | |
65 | #define LP5562_REG_G_CURRENT 0x06 | |
66 | #define LP5562_REG_B_CURRENT 0x05 | |
67 | #define LP5562_REG_W_CURRENT 0x0F | |
68 | ||
69 | /* CONFIG Register 08h */ | |
70 | #define LP5562_REG_CONFIG 0x08 | |
81f2a5b4 KM |
71 | #define LP5562_PWM_HF 0x40 |
72 | #define LP5562_PWRSAVE_EN 0x20 | |
73 | #define LP5562_CLK_INT 0x01 /* Internal clock */ | |
74 | #define LP5562_DEFAULT_CFG (LP5562_PWM_HF | LP5562_PWRSAVE_EN) | |
ff45262a KM |
75 | |
76 | /* RESET Register 0Dh */ | |
77 | #define LP5562_REG_RESET 0x0D | |
78 | #define LP5562_RESET 0xFF | |
79 | ||
80 | /* PROGRAM ENGINE Registers */ | |
81 | #define LP5562_REG_PROG_MEM_ENG1 0x10 | |
82 | #define LP5562_REG_PROG_MEM_ENG2 0x30 | |
83 | #define LP5562_REG_PROG_MEM_ENG3 0x50 | |
84 | ||
85 | /* LEDMAP Register 70h */ | |
86 | #define LP5562_REG_ENG_SEL 0x70 | |
87 | #define LP5562_ENG_SEL_PWM 0 | |
88 | #define LP5562_ENG_FOR_RGB_M 0x3F | |
89 | #define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */ | |
90 | #define LP5562_ENG_FOR_W_M 0xC0 | |
91 | #define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */ | |
92 | #define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */ | |
93 | #define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */ | |
94 | ||
95 | /* Program Commands */ | |
96 | #define LP5562_CMD_DISABLE 0x00 | |
97 | #define LP5562_CMD_LOAD 0x15 | |
98 | #define LP5562_CMD_RUN 0x2A | |
99 | #define LP5562_CMD_DIRECT 0x3F | |
100 | #define LP5562_PATTERN_OFF 0 | |
101 | ||
102 | static inline void lp5562_wait_opmode_done(void) | |
103 | { | |
104 | /* operation mode change needs to be longer than 153 us */ | |
105 | usleep_range(200, 300); | |
106 | } | |
107 | ||
108 | static inline void lp5562_wait_enable_done(void) | |
109 | { | |
110 | /* it takes more 488 us to update ENABLE register */ | |
111 | usleep_range(500, 600); | |
112 | } | |
113 | ||
114 | static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current) | |
115 | { | |
85775013 | 116 | static const u8 addr[] = { |
ff45262a KM |
117 | LP5562_REG_R_CURRENT, |
118 | LP5562_REG_G_CURRENT, | |
119 | LP5562_REG_B_CURRENT, | |
120 | LP5562_REG_W_CURRENT, | |
121 | }; | |
122 | ||
123 | led->led_current = led_current; | |
124 | lp55xx_write(led->chip, addr[led->chan_nr], led_current); | |
125 | } | |
126 | ||
127 | static void lp5562_load_engine(struct lp55xx_chip *chip) | |
128 | { | |
129 | enum lp55xx_engine_index idx = chip->engine_idx; | |
85775013 | 130 | static const u8 mask[] = { |
ff45262a KM |
131 | [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M, |
132 | [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M, | |
133 | [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M, | |
134 | }; | |
135 | ||
85775013 | 136 | static const u8 val[] = { |
ff45262a KM |
137 | [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1, |
138 | [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2, | |
139 | [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3, | |
140 | }; | |
141 | ||
142 | lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]); | |
143 | ||
144 | lp5562_wait_opmode_done(); | |
145 | } | |
146 | ||
147 | static void lp5562_stop_engine(struct lp55xx_chip *chip) | |
148 | { | |
149 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE); | |
150 | lp5562_wait_opmode_done(); | |
151 | } | |
152 | ||
153 | static void lp5562_run_engine(struct lp55xx_chip *chip, bool start) | |
154 | { | |
155 | int ret; | |
156 | u8 mode; | |
157 | u8 exec; | |
158 | ||
159 | /* stop engine */ | |
160 | if (!start) { | |
161 | lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT); | |
162 | lp5562_wait_enable_done(); | |
163 | lp5562_stop_engine(chip); | |
164 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); | |
165 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); | |
166 | lp5562_wait_opmode_done(); | |
167 | return; | |
168 | } | |
169 | ||
170 | /* | |
171 | * To run the engine, | |
172 | * operation mode and enable register should updated at the same time | |
173 | */ | |
174 | ||
175 | ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode); | |
176 | if (ret) | |
177 | return; | |
178 | ||
179 | ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec); | |
180 | if (ret) | |
181 | return; | |
182 | ||
183 | /* change operation mode to RUN only when each engine is loading */ | |
184 | if (LP5562_ENG1_IS_LOADING(mode)) { | |
185 | mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1; | |
186 | exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1; | |
187 | } | |
188 | ||
189 | if (LP5562_ENG2_IS_LOADING(mode)) { | |
190 | mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2; | |
191 | exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2; | |
192 | } | |
193 | ||
194 | if (LP5562_ENG3_IS_LOADING(mode)) { | |
195 | mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3; | |
196 | exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3; | |
197 | } | |
198 | ||
199 | lp55xx_write(chip, LP5562_REG_OP_MODE, mode); | |
200 | lp5562_wait_opmode_done(); | |
201 | ||
202 | lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec); | |
203 | lp5562_wait_enable_done(); | |
204 | } | |
205 | ||
206 | static int lp5562_update_firmware(struct lp55xx_chip *chip, | |
207 | const u8 *data, size_t size) | |
208 | { | |
209 | enum lp55xx_engine_index idx = chip->engine_idx; | |
210 | u8 pattern[LP5562_PROGRAM_LENGTH] = {0}; | |
85775013 | 211 | static const u8 addr[] = { |
ff45262a KM |
212 | [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1, |
213 | [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2, | |
214 | [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3, | |
215 | }; | |
216 | unsigned cmd; | |
217 | char c[3]; | |
218 | int program_size; | |
219 | int nrchars; | |
220 | int offset = 0; | |
221 | int ret; | |
222 | int i; | |
223 | ||
224 | /* clear program memory before updating */ | |
225 | for (i = 0; i < LP5562_PROGRAM_LENGTH; i++) | |
226 | lp55xx_write(chip, addr[idx] + i, 0); | |
227 | ||
228 | i = 0; | |
229 | while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) { | |
230 | /* separate sscanfs because length is working only for %s */ | |
231 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
232 | if (ret != 1) | |
233 | goto err; | |
234 | ||
235 | ret = sscanf(c, "%2x", &cmd); | |
236 | if (ret != 1) | |
237 | goto err; | |
238 | ||
239 | pattern[i] = (u8)cmd; | |
240 | offset += nrchars; | |
241 | i++; | |
242 | } | |
243 | ||
244 | /* Each instruction is 16bit long. Check that length is even */ | |
245 | if (i % 2) | |
246 | goto err; | |
247 | ||
248 | program_size = i; | |
249 | for (i = 0; i < program_size; i++) | |
250 | lp55xx_write(chip, addr[idx] + i, pattern[i]); | |
251 | ||
252 | return 0; | |
253 | ||
254 | err: | |
255 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
256 | return -EINVAL; | |
257 | } | |
258 | ||
259 | static void lp5562_firmware_loaded(struct lp55xx_chip *chip) | |
260 | { | |
261 | const struct firmware *fw = chip->fw; | |
262 | ||
ed2abfeb NS |
263 | /* |
264 | * the firmware is encoded in ascii hex character, with 2 chars | |
265 | * per byte | |
266 | */ | |
267 | if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) { | |
ff45262a KM |
268 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", |
269 | fw->size); | |
270 | return; | |
271 | } | |
272 | ||
273 | /* | |
d1b7c934 | 274 | * Program memory sequence |
ff45262a KM |
275 | * 1) set engine mode to "LOAD" |
276 | * 2) write firmware data into program memory | |
277 | */ | |
278 | ||
279 | lp5562_load_engine(chip); | |
280 | lp5562_update_firmware(chip, fw->data, fw->size); | |
281 | } | |
282 | ||
283 | static int lp5562_post_init_device(struct lp55xx_chip *chip) | |
284 | { | |
285 | int ret; | |
81f2a5b4 | 286 | u8 cfg = LP5562_DEFAULT_CFG; |
ff45262a KM |
287 | |
288 | /* Set all PWMs to direct control mode */ | |
289 | ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); | |
290 | if (ret) | |
291 | return ret; | |
292 | ||
293 | lp5562_wait_opmode_done(); | |
294 | ||
81f2a5b4 KM |
295 | /* Update configuration for the clock setting */ |
296 | if (!lp55xx_is_extclk_used(chip)) | |
297 | cfg |= LP5562_CLK_INT; | |
298 | ||
299 | ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg); | |
ff45262a KM |
300 | if (ret) |
301 | return ret; | |
302 | ||
303 | /* Initialize all channels PWM to zero -> leds off */ | |
304 | lp55xx_write(chip, LP5562_REG_R_PWM, 0); | |
305 | lp55xx_write(chip, LP5562_REG_G_PWM, 0); | |
306 | lp55xx_write(chip, LP5562_REG_B_PWM, 0); | |
307 | lp55xx_write(chip, LP5562_REG_W_PWM, 0); | |
308 | ||
309 | /* Set LED map as register PWM by default */ | |
310 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
95b2af63 | 315 | static int lp5562_led_brightness(struct lp55xx_led *led) |
ff45262a | 316 | { |
ff45262a | 317 | struct lp55xx_chip *chip = led->chip; |
85775013 | 318 | static const u8 addr[] = { |
ff45262a KM |
319 | LP5562_REG_R_PWM, |
320 | LP5562_REG_G_PWM, | |
321 | LP5562_REG_B_PWM, | |
322 | LP5562_REG_W_PWM, | |
323 | }; | |
95b2af63 | 324 | int ret; |
ff45262a KM |
325 | |
326 | mutex_lock(&chip->lock); | |
95b2af63 | 327 | ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness); |
ff45262a | 328 | mutex_unlock(&chip->lock); |
95b2af63 AL |
329 | |
330 | return ret; | |
ff45262a KM |
331 | } |
332 | ||
333 | static void lp5562_write_program_memory(struct lp55xx_chip *chip, | |
334 | u8 base, const u8 *rgb, int size) | |
335 | { | |
336 | int i; | |
337 | ||
338 | if (!rgb || size <= 0) | |
339 | return; | |
340 | ||
341 | for (i = 0; i < size; i++) | |
342 | lp55xx_write(chip, base + i, *(rgb + i)); | |
343 | ||
344 | lp55xx_write(chip, base + i, 0); | |
345 | lp55xx_write(chip, base + i + 1, 0); | |
346 | } | |
347 | ||
348 | /* check the size of program count */ | |
349 | static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn) | |
350 | { | |
432eb69d JH |
351 | return ptn->size_r >= LP5562_PROGRAM_LENGTH || |
352 | ptn->size_g >= LP5562_PROGRAM_LENGTH || | |
353 | ptn->size_b >= LP5562_PROGRAM_LENGTH; | |
ff45262a KM |
354 | } |
355 | ||
356 | static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode) | |
357 | { | |
358 | struct lp55xx_predef_pattern *ptn; | |
359 | int i; | |
360 | ||
361 | if (mode == LP5562_PATTERN_OFF) { | |
362 | lp5562_run_engine(chip, false); | |
363 | return 0; | |
364 | } | |
365 | ||
366 | ptn = chip->pdata->patterns + (mode - 1); | |
367 | if (!ptn || _is_pc_overflow(ptn)) { | |
368 | dev_err(&chip->cl->dev, "invalid pattern data\n"); | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
372 | lp5562_stop_engine(chip); | |
373 | ||
374 | /* Set LED map as RGB */ | |
375 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB); | |
376 | ||
377 | /* Load engines */ | |
378 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
379 | chip->engine_idx = i; | |
380 | lp5562_load_engine(chip); | |
381 | } | |
382 | ||
383 | /* Clear program registers */ | |
384 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0); | |
385 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0); | |
386 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0); | |
387 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0); | |
388 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0); | |
389 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0); | |
390 | ||
391 | /* Program engines */ | |
392 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1, | |
393 | ptn->r, ptn->size_r); | |
394 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2, | |
395 | ptn->g, ptn->size_g); | |
396 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3, | |
397 | ptn->b, ptn->size_b); | |
398 | ||
399 | /* Run engines */ | |
400 | lp5562_run_engine(chip, true); | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | static ssize_t lp5562_store_pattern(struct device *dev, | |
406 | struct device_attribute *attr, | |
407 | const char *buf, size_t len) | |
408 | { | |
409 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
410 | struct lp55xx_chip *chip = led->chip; | |
411 | struct lp55xx_predef_pattern *ptn = chip->pdata->patterns; | |
412 | int num_patterns = chip->pdata->num_patterns; | |
413 | unsigned long mode; | |
414 | int ret; | |
415 | ||
416 | ret = kstrtoul(buf, 0, &mode); | |
417 | if (ret) | |
418 | return ret; | |
419 | ||
420 | if (mode > num_patterns || !ptn) | |
421 | return -EINVAL; | |
422 | ||
423 | mutex_lock(&chip->lock); | |
424 | ret = lp5562_run_predef_led_pattern(chip, mode); | |
425 | mutex_unlock(&chip->lock); | |
426 | ||
427 | if (ret) | |
428 | return ret; | |
429 | ||
430 | return len; | |
431 | } | |
432 | ||
433 | static ssize_t lp5562_store_engine_mux(struct device *dev, | |
434 | struct device_attribute *attr, | |
435 | const char *buf, size_t len) | |
436 | { | |
437 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
438 | struct lp55xx_chip *chip = led->chip; | |
439 | u8 mask; | |
440 | u8 val; | |
441 | ||
442 | /* LED map | |
443 | * R ... Engine 1 (fixed) | |
444 | * G ... Engine 2 (fixed) | |
445 | * B ... Engine 3 (fixed) | |
446 | * W ... Engine 1 or 2 or 3 | |
447 | */ | |
448 | ||
449 | if (sysfs_streq(buf, "RGB")) { | |
450 | mask = LP5562_ENG_FOR_RGB_M; | |
451 | val = LP5562_ENG_SEL_RGB; | |
452 | } else if (sysfs_streq(buf, "W")) { | |
453 | enum lp55xx_engine_index idx = chip->engine_idx; | |
454 | ||
455 | mask = LP5562_ENG_FOR_W_M; | |
456 | switch (idx) { | |
457 | case LP55XX_ENGINE_1: | |
458 | val = LP5562_ENG1_FOR_W; | |
459 | break; | |
460 | case LP55XX_ENGINE_2: | |
461 | val = LP5562_ENG2_FOR_W; | |
462 | break; | |
463 | case LP55XX_ENGINE_3: | |
464 | val = LP5562_ENG3_FOR_W; | |
465 | break; | |
466 | default: | |
467 | return -EINVAL; | |
468 | } | |
469 | ||
470 | } else { | |
471 | dev_err(dev, "choose RGB or W\n"); | |
472 | return -EINVAL; | |
473 | } | |
474 | ||
475 | mutex_lock(&chip->lock); | |
476 | lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val); | |
477 | mutex_unlock(&chip->lock); | |
478 | ||
479 | return len; | |
480 | } | |
481 | ||
daa124b1 MK |
482 | static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern); |
483 | static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux); | |
ff45262a KM |
484 | |
485 | static struct attribute *lp5562_attributes[] = { | |
486 | &dev_attr_led_pattern.attr, | |
487 | &dev_attr_engine_mux.attr, | |
488 | NULL, | |
489 | }; | |
490 | ||
491 | static const struct attribute_group lp5562_group = { | |
492 | .attrs = lp5562_attributes, | |
493 | }; | |
494 | ||
495 | /* Chip specific configurations */ | |
496 | static struct lp55xx_device_config lp5562_cfg = { | |
497 | .max_channel = LP5562_MAX_LEDS, | |
498 | .reset = { | |
499 | .addr = LP5562_REG_RESET, | |
500 | .val = LP5562_RESET, | |
501 | }, | |
502 | .enable = { | |
503 | .addr = LP5562_REG_ENABLE, | |
504 | .val = LP5562_ENABLE_DEFAULT, | |
505 | }, | |
506 | .post_init_device = lp5562_post_init_device, | |
507 | .set_led_current = lp5562_set_led_current, | |
95b2af63 | 508 | .brightness_fn = lp5562_led_brightness, |
ff45262a KM |
509 | .run_engine = lp5562_run_engine, |
510 | .firmware_cb = lp5562_firmware_loaded, | |
511 | .dev_attr_group = &lp5562_group, | |
512 | }; | |
513 | ||
514 | static int lp5562_probe(struct i2c_client *client, | |
515 | const struct i2c_device_id *id) | |
516 | { | |
517 | int ret; | |
518 | struct lp55xx_chip *chip; | |
519 | struct lp55xx_led *led; | |
ed133352 | 520 | struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev); |
8853c95e | 521 | struct device_node *np = dev_of_node(&client->dev); |
e015050c | 522 | |
92a81562 DM |
523 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
524 | if (!chip) | |
525 | return -ENOMEM; | |
526 | ||
527 | chip->cfg = &lp5562_cfg; | |
528 | ||
ed133352 | 529 | if (!pdata) { |
e015050c | 530 | if (np) { |
92a81562 DM |
531 | pdata = lp55xx_of_populate_pdata(&client->dev, np, |
532 | chip); | |
ed133352 MK |
533 | if (IS_ERR(pdata)) |
534 | return PTR_ERR(pdata); | |
e015050c KM |
535 | } else { |
536 | dev_err(&client->dev, "no platform data\n"); | |
537 | return -EINVAL; | |
538 | } | |
ff45262a KM |
539 | } |
540 | ||
ff45262a | 541 | |
a86854d0 KC |
542 | led = devm_kcalloc(&client->dev, |
543 | pdata->num_channels, sizeof(*led), GFP_KERNEL); | |
ff45262a KM |
544 | if (!led) |
545 | return -ENOMEM; | |
546 | ||
547 | chip->cl = client; | |
548 | chip->pdata = pdata; | |
ff45262a KM |
549 | |
550 | mutex_init(&chip->lock); | |
551 | ||
552 | i2c_set_clientdata(client, led); | |
553 | ||
554 | ret = lp55xx_init_device(chip); | |
555 | if (ret) | |
556 | goto err_init; | |
557 | ||
558 | ret = lp55xx_register_leds(led, chip); | |
559 | if (ret) | |
c732eaf0 | 560 | goto err_out; |
ff45262a KM |
561 | |
562 | ret = lp55xx_register_sysfs(chip); | |
563 | if (ret) { | |
564 | dev_err(&client->dev, "registering sysfs failed\n"); | |
c732eaf0 | 565 | goto err_out; |
ff45262a KM |
566 | } |
567 | ||
568 | return 0; | |
569 | ||
c732eaf0 | 570 | err_out: |
ff45262a KM |
571 | lp55xx_deinit_device(chip); |
572 | err_init: | |
573 | return ret; | |
574 | } | |
575 | ||
576 | static int lp5562_remove(struct i2c_client *client) | |
577 | { | |
578 | struct lp55xx_led *led = i2c_get_clientdata(client); | |
579 | struct lp55xx_chip *chip = led->chip; | |
580 | ||
581 | lp5562_stop_engine(chip); | |
582 | ||
583 | lp55xx_unregister_sysfs(chip); | |
ff45262a KM |
584 | lp55xx_deinit_device(chip); |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static const struct i2c_device_id lp5562_id[] = { | |
590 | { "lp5562", 0 }, | |
591 | { } | |
592 | }; | |
593 | MODULE_DEVICE_TABLE(i2c, lp5562_id); | |
594 | ||
28720cff AL |
595 | #ifdef CONFIG_OF |
596 | static const struct of_device_id of_lp5562_leds_match[] = { | |
597 | { .compatible = "ti,lp5562", }, | |
598 | {}, | |
599 | }; | |
600 | ||
601 | MODULE_DEVICE_TABLE(of, of_lp5562_leds_match); | |
602 | #endif | |
603 | ||
ff45262a KM |
604 | static struct i2c_driver lp5562_driver = { |
605 | .driver = { | |
606 | .name = "lp5562", | |
28720cff | 607 | .of_match_table = of_match_ptr(of_lp5562_leds_match), |
ff45262a KM |
608 | }, |
609 | .probe = lp5562_probe, | |
610 | .remove = lp5562_remove, | |
611 | .id_table = lp5562_id, | |
612 | }; | |
613 | ||
614 | module_i2c_driver(lp5562_driver); | |
615 | ||
616 | MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver"); | |
617 | MODULE_AUTHOR("Milo Kim"); | |
618 | MODULE_LICENSE("GPL"); |